Structure and magnetic properties of bulk amorphous (Fe0.61Co0.10Zr0.025Hf0.025W0.02Ti0.02B0.20)94Y6 alloy

• Autorzy: Błoch K.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this paper were studies of the structure and magnetic properties of the bulk amorphous (Fe0.61Co0.10Zr0.025Hf0.025W0.02Ti0.02B0.20)94Y6 alloy, obtained by suction-casting method. Design/methodology/approach: The microstructure of the as-quenched and annealed at 720K for 15 min samples was studied by X-ray diffractometry and Mössbauer spectroscopy. The transmission Mössbauer spectra for the powdered samples were measured at room temperature using conventional Mössbauer spectrometer working at a constant acceleration with a 57Co(Rh) radioactive source of the 70 mCi in activity. However, the low field magnetic properties such as magnetic susceptibility, its disaccommodation and core losses were measured by a transformer method using a completely automated set up. In susceptibiity and its disaccommodation studies the amplitude of the magnetizing field was 0.26 A/m. Before the measurements the samples were demagnetized in an alternating magnetic field with the amplitude decreasing from 800 A/m to zero during 1.1 s. The core losses and magnetic permeability as a function of the magnetizing field amplitude for the frequency up to 1 kHz were measured. Findings: The rods were fully amorphous which was confirmed by X-ray diffractometry and Mössbauer spectroscopy. On the basis studies of magnetization in high magnetic fields we have stated, that in investigated alloy, in the as-quenched state and after annealing, only structural defects called quasi-dislocation dipoles are present. The disaccommodation phenomenon in the investigated samples of (Fe0.61Co0.10Zr0.025Hf0.025W0.02Ti0.02B0.20)94Y6 alloy , related with the directional ordering of atomic pairs near the free volumes, is not observed. On the basis of the changes in core losses, it can be stated that the studied alloy at low frequencies the total losses are comparable with those observed in classical silicon-iron alloys. Practical implications: Using a vibrating sample magnetometer the magnetization in high magnetic fields was studied (in magnetic field up to 2 T). All investigations carried out for samples in the as-quenched state and after annealing. Originality/value: This paper presents studies relating to the structure and magnetic properties of the bulk amorphous (Fe0.61Co0.10Zr0.025Hf0.025W0.02Ti0.02B0.20) alloy, obtained in the form of rods with 2 mm in diameter and 2 cm long by the suction casting method

Słowa kluczowe

EN

bulk amorphous alloys; microstructure; core losses

PL

masywne szkło metaliczne; mikrostruktura; modele obwodowe

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2013
• Tom: Vol. 64, nr 2
• Strony: 97--102
• Opis fizyczny: Bibliogr. 13 poz.

Twórcy

autor

Błoch K.

• Institute of Physics, Faculty of Materials Processing Technology and Applied Physics, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

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